Whelk, shell occupied by Nereis, [298]
White Cat, [317]
Whitman, on Dicyemidae, [94];
on Hirudinea, [395] f., [402], [405] f.
Willemoes-Suhm, von, on Tetrastemma agricola, [101], [115], [117], [118]
Willey, on affinities of Nemertinea, [120] n.;
on Oligochaeta, [382]
Wings, of Chaetopterus, [295], [324]
Winter-eggs, of Mesostoma, [48];
of Rotifers, [217];